Piston.



PATENTED MAR. 24, 1908.

K. MATHEUS & E. T. HENDEE.

PISTON. APPLICATION FILED JULY 22 2 SHEETS-SHEET 1.

WITNESSES INVENTORS @IWJWM iJ/zawdf Vma No. 882,572. PATENTED MAR. 24,1908. K. MATHEUS & E. T. HENDEE.

PISTON. APPLICATION FILED JULY 22. 1907.

2 SHEETS-SHEET 2.

mvm'rores JM @Z/Mw awmiJT/f m 7 3g? WITNESSES vide a very cheap andsimple construction inafter described in the f piston embodying myinvention.

an end elevation thereof.

the wearing surface thereof surface adapted to be UNITED sTAtrns PATENTOFFICE.

KARL MATHEUS AND EDWARD THOMAS HENDEE, OF (.HICAGO, ILLINOIS.

PISTON.

Application filed July 22,

To all whom it may concern:

Be it known that we, KARL MATHEUs and EDWARD THOMAS HENDEE, bothcitizens of the United States, and residing at Chicago, in the county ofCook and State of Illinois, have invented a new and useful Improvementin Pistons, of which the following is a complete specification.

This invention relates to improvements in pistons and more articularlyto a piston adapted to change tlie position of its wearing surface withrespect to the cylinder.

Heretofore reciprocating pistons have been so constructed that any givenpoint on travels in a straight line longitudinally of the cylinder andconsequently all of its wear atthat point is along that line. i

The object of this invention is to provide a piston in which the wearingsurface thereof changes its position with respect to the cylinder, or inother words, to provide a piston in which any given point on its wearingsurface trave s in an irregular line longitudi- 1nally of the cylinderinstead of in a straight It is a further provide a piston object of theinvention to having a revoluble wearing revolved by the pressure of, themotive fluid during its operation.

It is also an object of the invention to proadapted to greatly lengthenthe life the cylinder and the iston.

he invention consists of the matters herespecification and out anddefined in the of both more fully pointed appended claims.

11 the drawings: Figure 1 is a view partly in section and partly in sideelevation of a Fig. 2 is Fig. 3 is a section of the following ring. Fig.4 is an outer face view of the same. Fi 5 is a side elevation of one ofthe rollers. Fig. 6 is a fragmentary section of the bull rin Fig. 7 is afragmentary end view thereof? Fig. 8 is a fragmentary section of thespider. Fig. 9 is a fragmentary end view of the piston with the pistonrod removed.

s shown in said drawings: 1 indicates the tapered end of a piston rod ofa reciprocating I piston, and rigidliy engaged thereon y means of a nut1 is a isk 2 of any preferred construction and material, preferably ofcast metal, but which as shown is cored to form a Specification ofLetters Patent.

1907. Serial No. 384,867.

Patented March 24, 1908.

spider and is of less diameter than the diameter of the cylinder inwhich it is to be used. At one end of said spider is provided aperipheral flange 2, and at'the other end is a peripheral' groove orrecess providing a shoulder 3 which is screw threaded, and a shoulder 4,which is provided in its periphery with a plurality of recesses 4. Aroller 5 is journaled in each of said recesses upon a shaft 5, engagedin the walls of the recess, and each of said rollers projects sli htlybeyond the periphery of the shoul er 4, as shown more clearly in Figs. 1and 8.

Having threaded engagement on the shoulder 3 is a locking ring 6 whichis adapted to be screwed in against the shoulder 4 and locked in placeby a tap screw 6 having threaded engagement between the shoulder 3 andsaid ring, as shown in Figs. 1 and 2. Said ring 6 is provided with aperipheral flange 7, corresponding with the flange 2 of the spider andis also provided with a lurality of peripheral recesses 7, correspon ingwith the recesses 4 in the shoulder 4. J ournaled in said recesses 7 onshafts 8 are the rollers 8 which also project slightly beyond theeripher of the ring.

W ithin t e seat formed between the flanges 2 and 7, and bearing u onthe rollers 5 and 8, is the ring 9, which have termed the bull ring andwhich fits closely between said flanges and is providedwith laterallyprojecting flanges 9, which project over the anges 2 and 7. Said ring .9is provided in its outer surface with grooves in which are seated thepacking-rings 10 of any desired construction, which are hel in lace bytap screws 10, as shown in Fig. 1. 11 one side of said bull ring isprovided a plurality of recesses or ports 11 which, as shown moreclearly in dotted lines in Fig. 1, have their end walls incliningtowards each other and one of which is more abrupt than the other, sothat steam exerts greater force against it and causes the ring torotate.

The operation is as follows: In assembling the device the bull rin 9 isinserted over the shoulder 4 onto the fFange '2 and then the lockin ringis screwed in place by engaging any suitable instrument in the holes 12in the outer face thereof. When said ring has been inserted to its limitthe tap screw 6 is inserted in its aperture and the ring is held therebfirmly in position. Inasmuch as the bull ring engages the rollers it isobvious referably of soft metal, and

impulse of the piston.

that it is free to rotate thereon, thereby providing a rotative wearingsurface for the piston. When steam gas, air, liquid or any otherpressure is admitted to the cylinder it enters the ports or recesses 1 1in the bull ring and owing to their form causes the ring to rotateslightly in the cylinder during each Obviously with a iston whosewearing surface is continuously shifting its line of travel with respectto the cylinder, the wear will be very evenly distributed and obviouslystruction maybe varied without departing from the principles of myinvention.

We claim as our invention: 1. Ina device of the class described thecombination with a disk of means affording a rotative wearing surface onits periphery and means adapting said surface to be ro -p tated by fluidpressure.

2. In a device of the class described the combination with a disk of aperipheral ring rotatively engaged thereon and means for rotating thesame during the operation-of the piston.

3. In a reciprocating piston, a bull ring providing the wearing surfacetherefor and roller bearings for said ring.

4. In a device of the class described the combination with a spider ofan automatically rotating ring thereon and means for securing said ringin lace. the class described the combination with a spider of rollerbearings thereon and a ring mounted on said bearings and affording awearing surface.

6. In a device of'the class described the combination with, a disk of aperipheral ring fitting thereon, anti-friction bearin s between saiddisk and ring and means %or securing said ring in osition.

7. n a device 0 the class described the combination with a piston rod ofa spider thereon, a rotative ring on the periphery'of said spider, alocking rin adapted to be engaged on the spider an .hold the rotativering in place and anti-friction bearings for said rotative ring. J f

8. In'a device of the class described the combination with a. spider ofroller bearings on its periphery, a locking rin adapted to be engage onsaid spider, ro ler bearings thereon in alinement with the bearings onmany details of con combination with a spider of a rotative ringsubscribed our names in witnesses' seams the spider and a ringrotatively engaged on r said bearin s.

. 9. In a device of the class described the combination with a spiderhaving a peripheral .flange thereon, of a locking rin hav-- ing aperipheral flange thereon, antiriction bearings on said spider and ringbetween said flanges and a ring rotatively engaged on said bearings.

10. n a piston, the combination with a disk having a peripheral racethereon, of antifliction bearings in said race a ring mounted on saidbearings and having recesses in one side thereof, and packing rings inthe circumference of said rlng.

11. In a device of the class described the carried on its cperiphery andhaving steam orts in one si e thereof.

12. In a device of the class described the combination with a pistonhead, having a peripheral seat therein, of anti-friction bearin s insaid seat anda bull ring mounted on said bearings and adapted to revolveduring the operation of the piston.

13'. The combination with a iston head having a flange and a pluralityo? recesses at its periphery, of roller bearings journaled in saidrecesses, a locking ring adapted for threaded engagement with saidpiston head and provided with a flange and recesses at its periphery,roller bearings in the recesses of said ring, and a bull ring mounted onsaid roller bearings between said flanges.

14. In a'device' ofthe classdescribed the combination with a spiderroviding a piston head, of a locking ring having threaded engagementwith said spider, means for locking said rin in lace, roller bearings inthe periphery o sai ring and spider, and a bull ring mounted thereon andprovided in its side with a plurality of abutment recesses in whichfluid pressure acts to rotate the bull we have hereunto rin I ntestimonywhereof the presence of two KARL MATHEUS. EDWARD THOMASWitnesses: I JosEPH SCHLENKEL, CARL HAERTING.

HENDEE.

